Steven Matthews (Wicklow, Green Party) | Oireachtas source

I am trying to read the explanatory note, the amendment and the Bill. There is reference to where a section of road has had a reduction in the speed limit applied. Is there a definition of "built-up area"? The term is referenced in the explanatory document. It is described as a "build-up area" but I presume that is meant to be a "built-up area". How do we define a "built-up area"?